A body travels uniformly a distance of `( 13.8 +- 0.2) m` in a time `(4.0 +- 0.3) s`. Find the velocity of the body within error limits and the percentage error.

Options

A. `(3.45 +- 0.2)ms^(-1)`
B. `(3.45 +- 0.3)ms^(-1)`
C. `(3.45 +- 0.4)ms^(-1)`
D. `(3.45 +- 0.5)ms^(-1)`

Answer

B

Explanation

`V = (S)/(T) rArr (Delta V)/(V) = (Delta S)/(S) + (Delta T)/(T), DeltaV = V ((DeltaS)/(S) + (Delta T)/(T))`